The simple reason for the difference is that poisons are only dangerous if they end up somewhere they shouldn't be. When we put lead in gasoline, it was going everywhere in the environment, including the air. Lead which is in a large enough chunk that it doesn't spontaneously become airborne is much less likely to end up inside of a human.
Brass also contains lead, which you almost certainly have inside of your house in a few places. Even 'lead-free' brass for plumbing contains some lead. https://en.wikipedia.org/wiki/Brass#Lead_content The key is that it has to be in low enough concentrations that it doesn't end up leaving the part and ending up in dangerous amounts inside of humans.
Unless you have occupational exposure, you have most likely not even come close to poisoning yourself even if you didn't follow any safety precautions. Lead is pretty bad, but it's not something that causes issues with any amount of exposure... you body can tolerate some lead exposure. A hobbyist that solders a dozen PCBs per year has a way different potential exposure than someone who solders a dozen per hour for 2000 hours per year.
> Like I don't see home depot selling liquid nitrogen wily nily. Same with oxygen tanks.
Brass also contains lead, which you almost certainly have inside of your house in a few places. Even 'lead-free' brass for plumbing contains some lead. https://en.wikipedia.org/wiki/Brass#Lead_content The key is that it has to be in low enough concentrations that it doesn't end up leaving the part and ending up in dangerous amounts inside of humans.
Unless you have occupational exposure, you have most likely not even come close to poisoning yourself even if you didn't follow any safety precautions. Lead is pretty bad, but it's not something that causes issues with any amount of exposure... you body can tolerate some lead exposure. A hobbyist that solders a dozen PCBs per year has a way different potential exposure than someone who solders a dozen per hour for 2000 hours per year.
> Like I don't see home depot selling liquid nitrogen wily nily. Same with oxygen tanks.
https://www.homedepot.com/p/Bernzomatic-1-4-oz-Oxygen-Gas-Cy...